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ST公司的STM32F401xD/xE系列是基于高性能ARM? Cortex? -M4 32位RISC核，工作頻率高達84MHz，具有浮點單元（FPU）單精度，支持所有ARM單精度數(shù)據(jù)處理指令和數(shù)據(jù)類型，還能實現(xiàn)全套DSP指令和存儲器保護單元（MPU），從而增強應用安全性。器件具有高速嵌入存儲器（512KB閃存，96KB SRAM）和擴展的增強I/O和外設，連接到兩條APB總線，兩條AHB總線和32位多個AHB總線矩陣;此外所有器件提供一個12位ADC，一個低功耗RTC，六個通用16位計時器，以及多種標準和高檔通信接口如I2C，SPI和全雙工I2S，以及USART，SDIO接口和USB 2.0 OTG全速接口等。工作溫度–40到+105℃，工作電壓1.7V-3.6V.器件主要用在馬達驅(qū)動和應用控制，醫(yī)療設備，工業(yè)應用如PLC，逆變器和電路中斷器，打印機和掃描儀，告警系統(tǒng)，視頻連接和HVAC，家用音頻設備以及其手機傳感器集線器。本文介紹了STM32F401xD/xE系列主要特性，框圖，電源方案圖以及評估板STM32 Nucleo-64板主要特性，硬件框圖，電路圖，材料清單和PCB布局圖。

The STM32F401XD/XE devices are based on the high-performance ARM? Cortex? -M4 32- bit RISC core operating at a frequency of up to 84 MHz. Its Cortex?-M4 core features a Floating point unit （FPU） single precision which supports all ARM single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit （MPU） which enhances application security. The STM32F401xD/xE incorporate high-speed embedded memories （512 Kbytes of Flash memory， 96 Kbytes of SRAM）， and an extensive range of enhanced I/Os and peripherals connected to two APB buses， two AHB buses and a 32-bit multi-AHB bus matrix. All devices offer one 12-bit ADC， a low-power RTC， six general-purpose 16-bit timers including one PWM timer for motor control， two general-purpose 32-bit timers. They also feature standard and advanced communication interfaces.

? Up to three I2Cs

? Up to four SPIs

? Two full duplex I2Ss. To achieve audio class accuracy， the I2S peripherals can be clocked via a dedicated internal audio PLL or via an external clock to allow synchronization.

? Three USARTs

? SDIO interface

? USB 2.0 OTG full speed interface

Refer to for the peripherals available for each part number.

The STM32F401xD/xEoperate in the –40 to +105 ℃ temperature range from a 1.7 （PDR OFF） to 3.6 V power supply. A comprehensive set of power-saving mode allows the design of low-power applications.

These features make the STM32F401xD/xE microcontrollers suitable for a wide range of applications：

? Motor drive and application control

? Medical equipment

? Industrial applications： PLC， inverters， circuit breakers

? Printers， and scanners

? Alarm systems， video intercom， and HVAC

? Home audio appliances

? Mobile phone sensor hub

STM32F401xD/xE系列主要特性：

? Core： ARM? 32-bit Cortex?-M4 CPU with FPU， Adaptive real-time accelerator （ART Accelerator?） allowing 0-wait state execution from Flash memory， frequency up to 84 MHz， memory protection unit， 105 DMIPS/1.25 DMIPS/MHz （Dhrystone 2.1）， and DSP instructions

? Memories

up to 512 Kbytes of Flash memory

– up to 96 Kbytes of SRAM

? Clock， reset and supply management

– 1.7 V to 3.6 V application supply and I/Os

– POR， PDR， PVD and BOR

– 4-to-26 MHz crystal oscillator

– Internal 16 MHz factory-trimmed RC

– 32 kHz oscillator for RTC with calibration

– Internal 32 kHz RC with calibration

? Power consumption

– Run： 146 μA/MHz （peripheral off）

– Stop （Flash in Stop mode， fast wakeup time）： 42 μATyp@25C;65 μA max @25℃

– Stop （Flash in Deep power down mode， fast wakeup time）： down to 10 μA @ 25 ℃;30 μA max @25℃

– Standby： 2.4 μA @25℃ / 1.7 V without RTC; 12 μA @85℃ @1.7 V

– VBAT supply for RTC： 1 μA @25℃

? 1×12-bit， 2.4 MSPS A/D converter： up to 16 channels

? General-purpose DMA： 16-stream DMA controllers with FIFOs and burst support

? Up to 11 timers： up to six 16-bit， two 32-bit timers up to 84 MHz， each with up to four IC/OC/PWM or pulse counter and quadrature （incremental） encoder input， two watchdog timers （independent and window） and a SysTick timer

? Debug mode

– Serial wire debug （SWD） & JTAG interfaces

– Cortex ？ -M4 Embedded Trace Macrocell?

? Up to 81 I/O ports with interrupt capability

– Up to 78 fast I/Os up to 42 MHz

– All I/O ports are 5 V-tolerant

? Up to 12 communication interfaces

– Up to 3 x I2C interfaces （SMBus/PMBus）

– Up to 3 USARTs （2 x 10.5 Mbit/s， 1 x 5.25 Mbit/s）， ISO 7816 interface， LIN，IrDA， modem control）

– Up to 4 SPIs （up to 42Mbit/s at fCPU = 84 MHz）， SPI2 and SPI3 with muxed full-duplex I2S to achieve audio class accuracy via internal audio PLL or external clock

– SDIO interface

– Advanced connectivity： USB 2.0 full-speed device/host/OTG controller with on-chip PHY ? CRC calculation unit

? 96-bit unique ID

? RTC： subsecond accuracy， hardware calendar

? All packages （WLCSP49， LQFP64/100， UFQFPN48， UFBGA100） are ECOPACK?2

圖1.STM32F401xD/xE系列框圖

圖2. STM32F401xD/xE系列電源方案圖

評估板STM32 Nucleo-64板

The STM32 Nucleo-64 boards provide an affordable and flexible way for users to try out new concepts and build prototypes with the STM32 microcontrollers， choosing from various combinations of performance， power consumption and features. For the compatible boards， the SMPS significantly reduces power consumption in Run mode.

The Arduino? Uno V3 connectivity support and the ST morpho headers allow the easy expansion of the functionality of the STM32 Nucleo open development platform with a wide choice of specialized shields.

The STM32 Nucleo-64 boards （NUCLEO-F030R8， NUCLEO-F070RB， NUCLEO-F072RB， NUCLEO-F091RC， NUCLEO-F103RB， NUCLEO-F302R8， NUCLEO-F303RE， NUCLEO-F334R8， NUCLEO-F401RE， NUCLEO-F410RB， NUCLEO-F411RE， NUCLEO-F446RE， NUCLEO-L010RB， NUCLEO-L053R8， NUCLEO-L073RZ， NUCLEO-L152RE， NUCLEO-L452RE， NUCLEO-L476RG） provide an affordable and flexible way for users to try out new concepts and build prototypes with the STM32 microcontrollers in LQFP64 package， choosing from the various combinations of performance， power consumption and features. The Arduino? Uno V3 connectivity support and the ST morpho headers allow to expand easily the functionality of the Nucleo open development platform with a wide choice of specialized shields. The STM32 Nucleoboards do not require any separate probe as they integrate the ST-LINK/V2-1 debugger and programmer. The STM32 Nucleo boards come with the STM32 comprehensive software HAL library together with various packaged software examples， as well as direct access to the Arm? Mbed? online resources at 。

圖3.評估板STM32 Nucleo-64板外形圖

評估板STM32 Nucleo-64板主要特性：

? STM32 microcontroller in LQFP64 package

? Three LEDs： – USB communication （LD1）， user LED （LD2）， power LED （LD3）

? Two push-buttons： USER and RESET

? Two types of extension resources

– Arduino? Uno V3 connectivity

– ST morpho extension pin headers for full access to all STM32 I/Os

? Flexible board power supply：

– USB VBUS or external source （3.3 V， 5 V， 7 - 12 V）

– Power management access point

? On-board ST-LINK/V2-1 debugger and programmer with SWD connector